Structural and Photocatalytic Properties of CuO Nanorods Using the Hydrothermal Treatment Method

In this work optical properties of CuO nanostructure were studied. CuO nanostructure were synthesized by the hydrothermal treatment method. The structural and chemical natures of the obtained materials were studied using powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and study optical properties by UV-visible spectral. The XRD patterns of the CuO nanostructures indicated that CuO phases (JCPDS 05- 0661). The top-view SEM images, it can be seen clearly that high-density, horizontally scattered nanorod were grown on the product prepared at concentration of NaOH (aq) 7.5 M at 180 C for 12 h. The spectral of UV-vis data recorded showed the strong cut off at 341 nm.

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Synthesis and Optical Properties of Eu3+ Doped NaYF4 and KYF4 Micro/Nanocrystals

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2016.11792 ◽

2016 ◽

Vol 16 (4) ◽

pp. 3857-3860 ◽

Cited By ~ 3

Author(s):

Siling Guo ◽

Chunyan Cao ◽

Renping Cao

Keyword(s):

Optical Properties ◽

Emission Spectra ◽

Local Environment ◽

Xrd Analysis ◽

X Ray Diffraction ◽

Sem Images ◽

X Ray ◽

Two Samples ◽

Xrd Patterns ◽

The Eu

Through a hydrothermal method, 1 mol% Eu3+ doped NaYF4 and KYF4 micro/nanocrystals have been synthesized. The materials were characterized by X-ray diffraction (XRD) patterns, field emission scanning electron microscopy (FE-SEM) images, room temperature photoluminescence (PL) excitation and emission spectra, and luminescent dynamic decay curves. The XRD analysis suggested the crystalline structures of the obtained samples. The FE-SEM images indicated the morphology and size of the obtained samples. The PL spectra illustrate the optical properties of Eu3+ in the two samples. Since it is sensitive to the local environment of the ion, the Eu3+ presents different optical properties in the NaYF4 and KYF4 materials.

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The structure and optical properties of organic semiconductor bulk hetrojunction blend (NiPcTs/Alq3) thin films

Iraqi Journal of Physics (IJP) ◽

10.30723/ijp.v15i33.138 ◽

2019 ◽

Vol 15 (33) ◽

pp. 40-48

Author(s):

Atyaf H. Kadhum

Keyword(s):

Thin Films ◽

Heat Treatment ◽

Optical Properties ◽

Spin Coating ◽

Annealing Temperature ◽

Bulk Heterojunction ◽

X Ray Diffraction ◽

X Ray ◽

Uv Visible ◽

Xrd Patterns

The effect of heat treatment on the optical properties of the bulk heterojunction blend nickel (II) phthalocyanine tetrasulfonic acid tetrasodium salt and Tris (8-hydroxyquinolinato) Aluminum (NiPcTs/Alq3) thin films which prepared by spin coating was described in this study. The films coated on a glass substrate with speed of 1500 rpm for 1.5 min and treated with different annealing temperature (373, 423 and 473) K. The samples characterized using UV-Vis, X ray diffraction and Fourier transform Infrared (FTIR) spectra, XRD patterns indicated the presence of amorphous and polycrystalline blend (NiPcTs/Alq3). The results of UV visible shows that the band gap increase with increasing the annealing temperature up to 373 K and decreases with increase the annealing temperature to (423, 473)K respectively.

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Synthesis and Characterization of Cadmium with Titanium Oxide (Cd-TiO2) Nanocomposite: Testing its Antibacterial Effect

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v12i4.4900 ◽

2021 ◽

Vol 12 (4) ◽

pp. 2523-2529

Author(s):

Daniel Sam N ◽

Anish C I ◽

Sabeena G ◽

Rajaduraipandian S ◽

Manobala ◽

...

Keyword(s):

Sol Gel ◽

Gram Negative Bacteria ◽

X Ray Diffraction ◽

Sem Images ◽

Gram Negative ◽

X Ray ◽

Weight Percentage ◽

Inhibition Concentration ◽

Xrd Patterns

Sol gel methods were used for the study of the antimicrobial activity of Cd-TiO2 against gram-negative and positive bacteria. These Cd-TiO2 have been characterized by various optical and techniques. They have been exhibited by X-ray diffraction, scanning electron microscopy, ultraviolet spectroscopy, and infrared spectroscopy. The structures of the various XRD patterns indicate that the product has a structure. The particle size of Cd-TiO2 is 35nm. The SEM images confirm the spherical appearance of the sample. The energy X-ray spectra have been confirmed as well and then C, O, Ti, Cd, Pt element are present in Cd-TiO2. The weight percentage of Cadmium is 5.8%, Ti is 51.03%, C is 5.13% and O is 31.75% in Cd-TiO2. BET image shows that the major pore size distribution of Cd-TiO2 is ranged from 2.24 nm. The Cd-TiO2 that the antibacterial activity when tested against the pathogens only gram-negative bacteria such as Pseudomonas. The zone of minimum inhibition concentration was measured in a range of 20mm in 25μl and 30mm in 100μl.

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Photocatalytic Comparative Study of TiO2, ZnO, Ag-G-ZnO and Ag-G-TiO2 Nanocomposite Films

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.751.825 ◽

2017 ◽

Vol 751 ◽

pp. 825-830 ◽

Cited By ~ 1

Author(s):

Phuri Kalnaowakul ◽

Tonghathai Phairatana ◽

Aphichart Rodchanarowan

Keyword(s):

Colloidal Solution ◽

Nanocomposite Films ◽

Blue Dye ◽

Methylene Blue Dye ◽

X Ray Diffraction ◽

Sem Images ◽

X Ray ◽

Vis Spectroscopy ◽

Photocatalytic Activities ◽

Xrd Patterns

In this study, the photocatalytic properties and morphology of TiO2, ZnO, Ag-graphene-zinc oxide (Ag-G-ZnO) and Ag-graphene-titanium dioxide (Ag-G-TiO2) nanocomposite were compared. The Ag-G-ZnO and Ag-G-TiO2 nanocomposite were successfully prepared by thermal decomposition of colloidal solution. These prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectroscopy and photocatalytic activities. The results from XRD patterns show that Ag-G-TiO2 composites and the Ag-G-ZnO nanocomposites were in the form of fcc and hcp crystal structure, respectively. The SEM images show that at calcination of 500 °C for 3 h, the composite thin film of Ag-G-ZnO and Ag-G-TiO2 were homogenous. In the case of the photocatalytic experiments using methylene blue dye (MB) under UV irradiation, the order of the photocatalytic activities from high to low performances are Ag-G-ZnO, Ag-G-TiO2, ZnO and TiO2, respectively.

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Optical and Structural Properties of PVP/Bi2S3 Nanoparticles by Chemical Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.678.248 ◽

2013 ◽

Vol 678 ◽

pp. 248-252

Author(s):

K. Kavi Rasu ◽

Dhandapani Vishnushankar ◽

V. Veeravazhuthi

Keyword(s):

Electron Microscopy ◽

Diffraction Spectrum ◽

X Ray Diffraction ◽

Sem Images ◽

X Ray ◽

Ir Studies ◽

Transmission Electron ◽

Ft Ir ◽

Crystalline Nature ◽

Uv Visible

Bismuth sulfide (Bi2S3) and Polyvinyl pyrrolidone (PVP) encapsulated Bi2S3 Nanoparticles are synthesized from aqueous solutions at room temperature. Synthesized samples are subjected to UV-Visible Spectroscopy, X-Ray Diffraction (XRD), Scanning electron microscopy (SEM), Energy Dispersive Analysis of X-ray (EDAX), Transmission Electron Microscopy (TEM) and FT-IR studies and their results are compared. X-ray diffraction spectrum reveals the crystalline nature of the synthesized samples. Grain size value of PVP/ Bi2S3 nanoparticles show a decrease when compared to Bi2S3 nanoparticles and this ensures the good encapsulant effect of PVP on Bi2S3 nanoparticles. SEM images show that all the particles in the synthesized sample are nearly equal in size. From the TEM image we conclude that the particle size lies between 30nm to 70nm. Finally the samples are subjected to EDAX studies for determining their composition.

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Reactive DC Magnetron Sputtered ZnO Thin Films for Piezoelectric Application

International Journal of Nanoscience ◽

10.1142/s0219581x1760047x ◽

2018 ◽

Vol 17 (03) ◽

pp. 1760047

Author(s):

M. Abinaya ◽

K. M. Dhanisha ◽

M. Manoj Cristopher ◽

P. Deepak Raj ◽

K. Jeyadheepan ◽

...

Keyword(s):

Electrical Resistance ◽

Zno Thin Films ◽

Zno Films ◽

Sem Images ◽

X Ray ◽

Glass Substrates ◽

Uv Visible ◽

Xrd Patterns ◽

Spherical Grains ◽

Enhanced Crystallinity

Zinc oxide (ZnO) films have been sputter coated over glass substrates at different cathode powers. Influence of cathode power on physical characteristics of ZnO samples was analyzed using X-ray diffractometer (XRD), field emission-scanning electron microscopy (FE-SEM), UV-Visible spectrophotometer and four-point probe (FPP) method. XRD patterns exhibited [Formula: see text]-axis-oriented ZnO and enhanced crystallinity with increase in cathode power due to the increase in adatom mobility. Uniformly arranged spherical grains were observed from FE-SEM images. The grain size increased from 25 to 40[Formula: see text]nm with increase in power. All samples exhibited high electrical resistance (G[Formula: see text]) which is compatible for piezoelectric application.

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Structural Disorder in Layered Hybrid Halide Perovskites: Types of Stacking Faults, Influence on Optical Properties and Their Suppression by Crystallization Engineering

Nanomaterials ◽

10.3390/nano11123333 ◽

2021 ◽

Vol 11 (12) ◽

pp. 3333

Author(s):

Andrei S. Tutantsev ◽

Ekaterina I. Marchenko ◽

Natalia N. Udalova ◽

Sergey A. Fateev ◽

Eugene A. Goodilin ◽

...

Keyword(s):

Optical Properties ◽

Stacking Faults ◽

Structural Disorder ◽

Model System ◽

Thickness Variation ◽

X Ray Diffraction ◽

X Ray ◽

Simple Addition ◽

Halide Perovskites ◽

Xrd Patterns

Layered hybrid halide perovskites (LHHPs) are an emerging type of semiconductor with a set of unique optoelectronic properties. However, the solution processing of high-quality LHHPs films with desired optical properties and phase composition is a challenging task, possibly due to the structural disorder in the LHHP phase. Nevertheless, there is still a lack of experimental evidence and understanding of the nature of the structural disorder in LHHPs and its influence on the optical properties of the material. In the current work, using 2D perovskites (C4H9NH3)2(CH3NH3)n−1PbnI3n+1 (further BA2MAn−1PbnI3n+1) with n = 1–4 as a model system, we demonstrate that deviations in LHHPs optical properties and X-ray diffraction occur due to the presence of continuous defects—Stacking Faults (SFs). Upon analyzing the experimental data and modeled XRD patterns of a possible set of stacking faults (SFs) in the BA2MAPb2I7 phase, we uncover the most plausible type of SFs, featured by the thickness variation within one perovskite slab. We also demonstrate the successful suppression of SFs formation by simple addition of BAI excess into BA2MAn−1PbnI3n+1 solutions.

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Electrodeposited Ni-Co Films from Electrolytes with Different Co Contents

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.406.219 ◽

2021 ◽

Vol 406 ◽

pp. 219-228

Author(s):

Ouahiba Herzallah ◽

Hachemi Ben Temam ◽

Asma Ababsa ◽

Abderrahmane Gana

Keyword(s):

Content Increase ◽

Nacl Solution ◽

X Ray Diffraction ◽

Sem Images ◽

X Ray ◽

Hcp Structure ◽

Xrd Patterns ◽

Steel Substrates ◽

Co Alloys ◽

Scanning Electron

Ni–Co alloy coatings were electrodeposited at various cobalt amounts on pretreated steel substrates. The co-deposition phenomenon of Ni-Co alloys was described as anomalous behaviour. Different techniques including scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX), X-ray diffraction (XRD) and potentiodynamic polarization were used to characterize the alloy coatings. EDX results showed that the Co content increase with the enhancing of Co amount. SEM images have shown that the increase of Co amount leads grain developing from large grain to branched grain form and that goes through spherical and pyramidal, this implies that the grain size of these alloy coatings is greatly affected by Co amount in the electrolyte baths. XRD patterns revealed that the phase structure of Ni–Co coatings is dramatically changed from fcc into hcp structure with the increase of Co amount. The electrochemical properties of Ni-Co alloy coatings evaluated in 3.5% NaCl solution reveal that Ni–34.32 wt.% Co alloy exhibits better corrosion resistance compared to pure Ni and other Ni–Co alloy coatings.

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Photocatalytic Activity of Sm, Zr Co-Doped TiO2 Synthesized by Ultrasonic Assisted Sol-Gel Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.631-632.399 ◽

2013 ◽

Vol 631-632 ◽

pp. 399-403

Author(s):

Xi Ming Luo ◽

Fen Fen Li ◽

Hong Tao Gao

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Sol Gel ◽

X Ray Diffraction ◽

Sem Images ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Ultrasonic Assisted ◽

Uv Visible

Sm, Zr doped nanocrystalline TiO2 powers were prepared successfully by a facile ultrasonic assisted sol-gel method. The products were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. X-ray diffraction peaks could be assigned to anatase TiO2, which confirms the crystallinity of the as-prepared samples. The SEM images demonstrated that the crystalinity is formed with spherical aggregates with average diameters ranging from 10 to 20 nm. The photocatalytic activity was studied on the photocatalytic degradation of methyl orange (MO) aqueous solution irradiated with UV-visible light. Under UV-visible light irradiation, the photocatalytic performances of the doped samples were much better than that of pure TiO2, and the co-dopant showed highest. It demonstrated that a strong Sm-Zr synergistic interaction might play a decisive role in driving the excellent photocatalytic performance of TiO2.

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